N99.86Intraoperative and postprocedural complications and disorders of breast

N99.86 is the ICD-10-CM diagnosis code for intraoperative and postprocedural complications and disorders of breast. It belongs to category N99 (intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified), block N99 (intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within N99.8 (other intraoperative and postprocedural complications and disorders of genitourinary system), N99.86 is specifically for intraoperative and postprocedural complications and disorders of breast. Related codes cover other intraoperative complications of genitourinary system (N99.81), postprocedural hemorrhage of a genitourinary system organ or structure following a procedure (N99.82), residual ovary syndrome (N99.83), postprocedural hematoma and seroma of a genitourinary system organ or structure following a procedure (N99.84), post endometrial ablation syndrome (N99.85) and other postprocedural complications and disorders of genitourinary system (N99.89).

To report this condition, pick the subcode that matches the documentation: N99.860 (ischemia) and N99.861 (necrosis).

It was added in FY2027, effective October 1, 2026.